[java] How to prevent null values inside a Map and null fields inside a bean from getting serialized through Jackson

I have a a Map<String,Foo> foosMap that I want to serialize through Jackson . Now I want following two settings on the serialization process:

1. The Map can have have plenty of null values and null keys and I don't want nulls to be serialized.
2. For all those Foos that are getting serialized, I do not want to serialize null objects referenced inside Foo.

What is the best way to achieve this ? I am using jackson-core1.9 and jackson-mapper1.9 jars in my project.

my solution, hope help
custom ObjectMapper and config to spring xml(register message conveters)

public class PyResponseConfigObjectMapper extends ObjectMapper {
public PyResponseConfigObjectMapper() {
    disable(SerializationFeature.WRITE_NULL_MAP_VALUES); //map no_null
    setSerializationInclusion(JsonInclude.Include.NON_NULL); // bean no_null
}

}

Answer seems to be a little old, What I did was to use this mapper to convert a MAP

      ObjectMapper mapper = new ObjectMapper().configure(SerializationConfig.Feature.WRITE_NULL_MAP_VALUES, false);

a simple Map:

          Map<String, Object> user = new HashMap<String,Object>();
            user.put( "id",  teklif.getAccount().getId() );
            user.put( "fname", teklif.getAccount().getFname());
            user.put( "lname", teklif.getAccount().getLname());
            user.put( "email", teklif.getAccount().getEmail());
            user.put( "test", null);

Use it like this for example:

      String json = mapper.writeValueAsString(user);

For Jackson versions < 2.0 use this annotation on the class being serialized:

@JsonSerialize(include=JsonSerialize.Inclusion.NON_NULL)